A hybrid dialogue management approach for a flight spoken dialogue system

Finite-state based dialogue management approaches are powerful for simple tasks with strict and reliable dialogue control, while the plan-based dialogue management approaches are feasible for tasks with several topics or one complex topic. However, neither one is good enough for dialogue control throughout in a dialogue task providing a flight information enquiry and ticket reservation service. To solve this problem, a hybrid dialogue management approach is proposed, in which the plan-based topic forest structure is combined with some finite-state control, so that a proper management element can function in different dialogue situations.